Lens marking gauge



C- W. FOCHT LENS MARKING GAUGE Oct. 5, 1948.

2 Sheets-Sheet 1 Filed may 10, 1945 Oct. 5, 1948. c. w. FOCHT 2,450,651

LENS MARKING GAUGE 2 Sheets-Sheet 2 Filed May 10, 1945 W/A V//////iZ% /0 & x

INVENTOR Patented Oct. 5, 1948 Lens-MARKING GAUGE CartW; F'ocht, South Wi1liamspcnt;fBa;., assignor of;v onerhalfir to; The; Valley Bank-0t. Phoenix-g, Phoenix; Ariz. in: National Banking? Association Application May 'IOf, 1945} SerihFNi). 593,001"

aelaims. (cites-ire) This invention relates to; marking gauges for ophthalmic lenses. which; in the further discus-- sion, will be referred to asv 'lenses; but thecharacter of the invention will be considered: in con nection' with the aforesaidld'efinition.

Itv is: anobject of the invention to produce a marking. gauge whereby the locations of holes" for receiving: the iastenings of mountings for. such lenses may" be: accurately determined; expeditiously; and-furthermore to: provide novel means associated: with a. lens support for holding; the. lens in. certain. relation to gauges or abutments whereon the lens is held while being marked;

- It: is furthermore an object ofithe invention. to; provide a; base and. adjustable elements. mounted: thereon which bemanipul'ated for' registering-spositionswherezthe lens istorbedrilled: for the mountings; thereof;

A further obj ect of theinvention is to: provide armemher for engaging a portion not the-periphery wedge. of the lens,. in: association with resilient means: for" exerting pressure on said embracing: member and: onotherrparts which: may-be brought into play for exerting: pressure on the: lens in -a: direction. at-an angle to the peripheral engaging: means a It is a still further object of the invention to provide a basefor supporting the-lens, and memberswhich are adjustable diagonally "of the base, which members have graduations and numerals: on their surfaces. near the lens-engaging edges thereof, the said members and base being provided with guiding means for causing the-coon eratibn of: thesaid members; with a lens: interposed between them audit; is: iurthermore the purpose of the inventor to provide meansforvrez-v taining one member stationary while the other is being manipulated with relation to the edge of the lens to bring them into coordination for a reading of the graduations with respect to a marking on the lens, which is commonly referred to in the art as the grinding line.

A further object of the invention is to provide a device of this character in which the lens and members carrying the graduations may be expeditiously manipulated for arriving at the locations where holes are to be bored in the lens for the mountings.

I ing part of this-application; whereimlike acters: denotezcorresponding parts; in thes'everalt 253 has an aperture-such as I 1.

aperture in each block is that they rnay be selec- With the foregoing and other objects in view,

the invention consists in the details of construction, and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings form- 5 held in position by the tension on the sliding char-- views, and in which- 7.

Figure I illustrates. a plan; view of the base,

showing a lens: engaged' by the elements: of: the

combination; for retainingtit in. placer Figure 2"- iilustrates a view elevation of the si'deof'the lens supporting member and.

parts: associated therewith; I I

Figure 3 illustrates a sectional; view: or the assembly on the- 1in 3 3 of. Fig. 11;:

Figure 4 illustrates-a sectional View on the; line.

-4 of Ii;

Figure 5":ill11strat'es az-csectionah view on 5:5 :0fF1'g!.. 13;: s V

Figure-6 illustrates: a-sectionalview on therlinc E -G 'ci Fig. Irandf the; line Figure 7illustrates a'perspective View of one of'thegraduated lenseengaging-members.

these drawings i i! denotes abase on table.

which is prcvided 'with radial slots- H: and 1 2, in which-guiding pins-13 and M areslidable, thesaid guiding pins eachdependihg from sliding blocks l=5 and IG; respectively; and eachg-uid'ing block;

tiveiy' occupied by a= peg'i d wh-ich enters an aperture i g'in' the base or table; The pegis removable and may be used in connection with either sliding block whi-Ie'the other one is left" free for movement longitudinally and; somewhat transverselfy of'the table: as the block is guided in the applqpr t'e slot; The guiding pins 1-3 and i 4 sliding blocks Iii and It have blocks lf5a: and .iiia' respectively; attached which depend. fromthe' attheir lower'endsbelow the base I 0, and"a coiled spring 20 has its ends 2| connected to the said blocks [5a and lfia, and the said spring embraces a wheel or pulley 22 rotatably mounted on a stud 23, which stud is anchored in the table on its underside and it will thus be seen that when one of the blocks is held stationary bya peg, the other block may be manipulated, as will presently appear, to position the grinding line of the lens parallel with a line extending from the graduation 50 on the stationary block. It is shown that the graduations of conventional type are numbered 38-, 40, 42, 44, 46, 48 and 50.

A flexible band 24, preferably of metal, has one end anchored to each sliding block, as shown at 25, and this band is of such length that it engages the edge or periphery of the lens and it aids in the retention of the lens as it is frictionally The purpose: of the blocks occasioned by the function of the spring 20.

'In operating the lens marker, it is suggested that the entire device thus described be held between the two hands of an operator and that pressure be exerted on the thumb piece at the bottom of the block that is free to slide and that it be pushed upwardly toward the right hand corner. The lens should then be inserted preferably by using the left thumb to manipulate the lens and the lens should be so positioned with its convex side up, in order that it may be engaged by the block when the block is released against the edge of the lens, The lens should then be adjusted with the grinding line thereof in a line parallel with the extension of the line 50 extending from the left block. Line 50 is the location for the mounting on the nasal side of the lens and it is immaterial whether the grinding line on the lens is exactly over the line 59 from the left, but it must be adjusted so that it is parallel with the line 50 from the left, whether above or below or exactly over it. For odd shaped lenses, it might be necessary to hold the lens up in position by pushing upwardly on the bottom of the lens with the left thumb so that the metal band around the top of the lens is tight against the lens. The first step is to mark the location of the hole on the nasal side of the lens which is always placed on the lens at line 50 from the left marking block, as it is illustrated in Figure 1. The mark for the hole on the opposite edge of the lens is located by determining the size of the lens and marking it at a graduation which corresponds with the number or size of the lens as, for example, if a size 42 lens is used, the mark for the hole on the right side, which would be the outside edge of the lens, would be on the line 42 on the right hand marking block. If the grinding line on the lens is kept parallel with the extension of the line 50 on the left block and the lens is held firmly up in place by pushing on the bottom of it, the accurate location of the outside hole for grinding can be easily and quickly ascertained by using the graduations or marking lines on the right sliding block.

The foregoing operation is followed for marking the left lens. The right lens can be marked by placing the left lens over the right lens and marking through the holes. However, if only the right lens is to be drilled, the lens could be marked with the same device by merely taking the peg out of the left sliding block and pushing the right sliding block upwardly toward the right hand corner until the peg can be inserted in the holes along the line 50 on the right, and thereafter the 4 operation would be the same as has been explained, except that the left marking block would be manipulated and the graduations would be made from the left marking block.

The base may have a support 26 at its rear edge and a support 21 at its front edge, the former of which is higher than the support 21 in order that the base may be supported at an inclined position, as such position better adapts the mechanism for convenient reading and manipulation.

I claim:

1. Ina lens marking gauge, a base, blocks movably mounted thereon having approximately parallel edges and graduations on their surfaces near the said edges, means for guiding the blocks divergently during their movement toward the upper edge of the base, means for selectively holding either of the blocks in a predetermined position while the other is movable with relation to it, a flexible band having a looped portion between the said blocks and having its ends connected to said blocks whereby the band may partially embrace the edges of a lens interposed between the blocks, and means for exerting a pull on the blocks against the action of pressure tending to move the blocks toward the upper edge of the base.

2. In a lens marking gauge, a base, blocks movably mounted thereon having approximately parallel edges and graduations on their surfaces near the said edges, means for guiding the blocks divergently during their movement toward the upper edge of the base, means for selectively holding either of the blocks in a predetermined position while the other is movable with relation to it, a flexible band having a looped portion between the said blocks and having its ends connected to said blocks whereby the band may partially embrace the edges of a lens interposed between the blocks, and means for exerting a pull on the blocks against the action of pressure tending to move the blocks toward the upper edge of the base, said means comprising a resilient element having its ends mediately connected to the blocks, and an element stationed between and below the blocks around which the flexible element operates.

CARL W. FOCI-IT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 803,794 Starbuck Nov. '7, 1905 1,756,851 Clement -1- Apr. 29, 1930 2,088,914 Long Aug. 3, 1937 

